15211320000 has 140 divisors (see below), whose sum is σ = 50292569976. Its totient is φ = 4056320000.

The previous prime is 15211319987. The next prime is 15211320037. The reversal of 15211320000 is 2311251.

It is a super-2 number, since 2×15211320000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56620 + ... + 183380.

Almost surely, 2^15211320000 is an apocalyptic number.

15211320000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15211320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25146284988).

15211320000 is an abundant number, since it is smaller than the sum of its proper divisors (35081249976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15211320000 is an equidigital number, since it uses as much as digits as its factorization.

15211320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126796 (or 126771 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 15211320000 its reverse (2311251), we get a palindrome (15213631251).

The spelling of 15211320000 in words is "fifteen billion, two hundred eleven million, three hundred twenty thousand".